I have bought common cathode rgb leds from ebay. Thing is, the TLC5940 PWM drive I bought is only able to sink so I should have bought common anode instead. Maybe you can change your hardware to use these common anode leds.

I just wanted some common cathode led's to play with... 20 more arrived today on the packet it says common cathode, most not so... i'll try 1 more time off of ebay, i got 40 RGB LED's Anode... they should all be CATHODE!!!!

I just dont buy components from ebay, last time I did they were right, but looked like they have been sitting on the shelf for a decade, cause most of that stuff has been

Such a rigid rule to want to follow! I love some of my e-bay impulse buys of electronic parts and stuff. This latest purchase has been really cool to play around with. Use it as a adjustable voltage regulator and have it read input or output voltage and current draw, or adjust it to be a constant current driver. Lots of fun and uses for $11.

Look carefully, they do not appear to be the same device. The one I bought has two pots to make the device act as either a constant voltage regulator or a constant current regulator. Plus mine reads alternatly switches to display both voltage and current in the display. The one you bought appears to be just an adjustable constant voltage regulator with a voltmeter only display. I've bought some regulators like that for $1.52 each with free shipping also, but without the cool display of course.

I have bought common cathode RGB LEDs off eBay from China and they were what they said they were. The problem is that most sellers do not know what they are selling they are just selling on what they bought.

I have bought common cathode RGB LEDs off eBay from China and they were what they said they were. The problem is that most sellers do not know what they are selling they are just selling on what they bought.